"This is despite doctors fighting for her life including putting her on maximum artificial ventilation support, optimal antibiotic doses as well as stimulants which maximise her body's capability to fight infections."

The girl was described by Singapore doctors earlier on Friday as "struggling against the odds, and fighting for her life" after she was found with a lung infection and brain injuries in addition to suffering a cardiac arrest previously.

She had also been diagnosed with severe intestinal injuries as a result of being attacked with an iron bar during the assault in India's capital New Delhi on December 16.

On Thursday night, the hospital revealed that the woman, who is a student in Delhi, had undergone "three abdominal surgeries and experienced a cardiac arrest in India" as it gave the first detailed rundown of her condition.

The woman had been treated in Delhi's Safdarjung Hospital since she was thrown off a bus in the capital after six men took turns to rape her and assault with an iron bar in the moving vehicle, leaving her with intestinal injuries.

It has also announced plans to post the photos, names and addresses of convicted rapists on official websites to publicly shame them. The campaign will begin in Delhi, which has been dubbed India's "rape capital".

Protests continue

Several thousand riot police were again on duty on Thursday to prevent a group of around 500 people, mostly women, from marching on the presidential palace.

"We want justice," the protesters chanted, with some demanding the sacking of the Delhi police chief for authorising the use of teargas and water cannon at previous protests.

Son of India's president had to apologise after he described some of the protesters as "dented and painted" women [Reuters]

"We will win back our freedom!" the protesters, mostly university students, shouted as they pushed against barricades on a road leading to the city's landmark monument.

The country has been rocked by a wave of protests since the attack, including one in Delhi on Thursday when thousands, mainly girls and youth tried to march towards the main government building demanding end to violence against women.